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Chemistry
Q:
The density of H2 gas in a rigid container is 0.117 g/L at 55 C. What is the pressure of hydrogen in the flask if it is heated to 125 C? (R = 0.08206 Latm/molK)
A.0.142 atm
B.0.194 atm
C.1.56 atm
D.1.90 atm
E.3.55 atm
Q:
Calculate the density (in g/L) of CH4(g) at 75 C and 2.1 atm. (R = 0.08206 Latm/molK)
A. 0.18 g/L
B.0.85 g/L
C.1.2 g/L
D.3.2 g/L
E.5.5 g/L
Q:
Which of the following gases has the greatest density at 35 C and 450 mm Hg?
A.CH4
B.Ar
C.N2
D.Cl2
E.C3H8
Q:
What volume is occupied by 35.0 g of C2H2 at 471 mm Hg and 21 C? (R = 0.08206 Latm/molK)
A. 29.0 L
B.52.3 L
C.3.74 L
D.20.1 L
E.0.0689 L
Q:
A 45.0 L gas cylinder contains 988 g He at 23 C. What is the pressure inside the cylinder? (R = 0.08206 Latm/molK)
A.10.4 atm
B.41.4 atm
C.101 atm
D.133 atm
E.533 atm
Q:
The pressure of O2 in a 15.0 L flask is 322 mm Hg at 44 C. What mass of O2 is in the flask? (R = 0.08206 Latm/molK)
A.0.244 g
B.5.80 g
C.7.82 g
D.15.2 g
E.56.3 g
Q:
If 0.357 g of CH4 gas is introduced into an evacuated 1.75 L flask at 25 C, what is the pressure inside the flask? (R = 0.08206 Latm/molK)
A.0.952 atm
B.0.261 atm
C.0.311 atm
D.0.419 atm
E.4.99 atm
Q:
What volume of oxygen will react with 21 mL of ethanol, assuming the gases are present at the same temperature and pressure?
2 CH3CH2OH(g) + 6 O2(g) 4 CO2(g) + 6 H2O(g)
A.7.0 mL
B.14 mL
C.21 mL
D.42 mL
E.63 mL
Q:
At 338 mm Hg and 72 C, a sample of carbon monoxide gas occupies a volume of 0.225 L. The gas is transferred to a 1.50-L flask and the temperature is reduced to -15 C. What is the pressure of the gas in the flask?A.8.91 mm HgB.37.9 mm HgC.67.8 mm HgD.3.018 103 mm HgE.5.48 104 mm Hg
Q:
What volume of Ar at 45 C and 1.25 atm contains the same number of particles as 0.655 L of H2 at 15 C and 2.00 atm?
A.0.452 L
B.1.16 L
C.0.949 L
D.0.371 L
E.3.14 L
Q:
Which of the following relationships is/are CORRECT for gases?
1/ The amount of a gas (in moles) is inversely proportional to its volume (at constant temperature and pressure).
2/ The volume of a gas is directly proportional to its temperature in kelvin (at constant pressure and moles).
3/ The pressure of a gas is inversely proportional to its temperature in kelvin (at constant volume and moles).
A.1 only
B.2 only
C.3 only
D.1 and 2
E.2 and 3
Q:
Avogadro's hypothesis states that equal volumes of gases under the same conditions of temperature and pressure have equal ____.
A.numbers of particles
B.particle velocities
C.molar masses
D.densities
E.masses
Q:
You have a 30.0 L cylinder of helium at a pressure of 132 atm and a temperature of 19 C. The He is used to fill balloons to a volume of 1.80 L at 745 mm Hg and 27 C. How many balloons can be filled with He? Assume that the cylinder can provide He until its internal pressure reaches 1.00 atm (i.e., there are 131 atmospheres of usable He in the cylinder).
A.1.90 102
B.1.06 102
C.4.13 103
D.7.41 103
E.2.29 103
Q:
The molecule 2-chloro-4-methylhexane is made by addition of HCl to an alkene. Write a balanced chemical equation for this reaction.
Q:
Draw Lewis structures for all possible isomers of C3H6O.
Q:
A peptide bond is the amide linkage that is formed in a condensation reaction involving the __________ group of one amino acid with the carboxylic acid group of a second amino acid.
Q:
Cis-1,2-dichloroethylene and trans-1,2-dichloroethylene are examples of ________ isomers.
Q:
In vulcanized rubber, the polymer chains of natural rubber are cross-linked with sulfur atoms. The polymer chains stretch when stressed, but they return to their original shape when the stress is removed. Substances that behave this way are called ________.
Q:
Molecules with nonsuperimposable mirror images are termed chiral. Pairs of nonsuperimposable, mirror image molecules are called ________.
Q:
The process by which long chain hydrocarbons in petroleum are shortened is called ________.
Q:
Polyvinyl chloride is used in raincoats and pipes. It is produced by the addition reaction of chloroethylene, CH2CHCl. What is the structure of the polymer produced in this reaction?
A.
B.
C.
D.
E.
Q:
Low density polyethylene (LDPE) is most likely to be used in
A.sandwich bags.
B.bottle caps.
C.rigid pipes.
D.contact lenses.
E.fabrics and apparel.
Q:
What is the monomer of Teflon?
A.CH2CH2
B.CF2CF2
C.CH2C(CN)2
D.CH2CHCN
E.CH2CHCH3
Q:
Amino acids polymerize in condensation reactions that result in the formation of an amide linkage (or peptide bond) between amino acid molecules. What dipeptide(s) may be formed in the reaction of glycine with phenylalanine? A.1 only
B.2 only
C.3 only
D.4 only
E.1 and 4
Q:
Which of the following statements is/are CORRECT?
1/ Thermoplastics are a class of polymers that will not decompose at temperatures as great as 700 C.
2/ Thermosetting plastics harden when heated, but they regain their elasticity when cooled.
3/ Elastomers are materials that spring back to their original shape when stretched.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
Q:
Which of the following statements is/are CORRECT?
1/ Polyethylene forms by the addition reaction of C2H4 molecules.
2/ Copolymers form by the polymerization of two (or more) different monomers.
3/ A condensation reaction involves reacting two monomers and splitting out a small molecule, often water.
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3
Q:
What is the hybridization and the bond angles around the nitrogen atom in an amide?
A.sp hybridization, 180 bond angles
B.sp2 hybridization and 109 bond angles
C.sp2 hybridization and 120 bond angles
D.sp3 hybridization and 109 bond angles
E.sp3 hybridization and 120 bond angles
Q:
An amine reacts with a(n) ____ to form an amide.
A.ether
B.alcohol
C.ester
D.aldehyde
E.carboxylic acid
Q:
What is the classification of the molecule below? A.polymer
B.fatty acid
C.saccharide
D.carbohydrate
E.triglyceride
Q:
What class of compounds is responsible for many of the distinctive odors of artificial flavors and perfumes?
A.ethers
B.aldehydes
C.esters
D.amides
E.alkenes
Q:
The hydrolysis of an ester in the presence of NaOH produces
A.a carboxylate salt of sodium and an alcohol.
B.an ether and an amide.
C.an alcohol and an amine.
D.an aldehyde and an ether.
E.an ether and a carboxylate salt of sodium.
Q:
What is the name of the product of the reaction that occurs when a mixture of methanol and propionic acid is heated in the presence of acid?
A.methyl propylether
B.2-propanone
C.propyl methanoate
D.2-methylpropanal
E.methyl propanoate
Q:
A mixture of ethanol and benzoic acid is heated in the presence of acid. What is the primary product of the reaction?
A.
B.
C.
D.
E.
Q:
What is the product of the reduction of butanone?
A.1-butene
B.2-butanol
C.cis-2-butene
D.acetone
E.butanoic acid
Q:
Which of the following compounds might be used to reduce a carboxylic acid to an aldehyde?
A.H+
B.Cl2
C.K2Cr2O7
D.KMnO4
E.NaBH4
Q:
Which of the following compounds might be used to oxidize an aldehyde to a carboxylic acid?
A.H2
B.Na
C.LiAlH4
D.KMnO4
E.NaBH4
Q:
When a secondary alcohol is oxidized, the product is a(n) ____.
A.ketone
B.ether
C.ester
D.aldehyde
E.amide
Q:
How many alcohols have the formula C4H10O?
A.2
B.3
C.4
D.5
E.6
Q:
When an aldehyde is oxidized, the product is a(n) ____.
A.ester
B.ketone
C.ether
D.alcohol
E.carboxylic acid
Q:
The functional group RCONR' is characteristic of a(n) ____.
A.ether
B.ester
C.amide
D.aldehyde
E.ketone
Q:
Which one of the following functional groups is a base?
A.aldehyde
B.alcohol
C.carboxylic acid
D.ether
E.amine
Q:
Which of the following statements concerning methanol is/are CORRECT?
1/ Methanol is used as a fuel in high-powered racing cars.
2/ Human consumption of methanol can lead to blindness.
3/ Methanol is converted by the humann body to formaldehyde and formic acid.
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3
Q:
Putrescine and cadaverine are two compounds associated with decaying flesh or bad breath. These compounds belong to a class of molecules called ____.
A.ethers
B.amines
C.ketones
D.esters
E.carboxylic acids
Q:
Which of the following alcohols is likely to be least soluble in water?
A.3-pentanol
B.2-butanol
C.1,2-ethanediol
D.1,2,3-propanetriol
E.methanol
Q:
Which functional group does not contain a double bond to an oxygen atom?
A.ester
B.aldehyde
C.ether
D.amide
E.ketone
Q:
Which functional group does not contain an oxygen atom?
A.ester
B.ether
C.aldehyde
D.amide
E.amine
Q:
Formulas for derivatives of hydrocarbons may be written as R-X, where R is a hydrocarbon lacking a hydrogen atom and X is a functional group. Which of the following formulas represents a ketone?
A.ROH
B.ROR'
C.RCOR'
D.RCO2R'
E.RCHO
Q:
Formulas for derivatives of hydrocarbons may be written as R-X, where R is a hydrocarbon lacking a hydrogen atom and X is a functional group. Which of the following formulas represents an ester?
A.ROH
B.ROR'
C.RCOR'
D.RCO2R'
E.RCHO
Q:
Which of the following chemical equations depicts a halogenation reaction with benzene?
A.C6H6() + 3 Br2(g) 3 C2H2Br2(g)
B.C6H6() + Cl2(g) C6H5Cl() + HCl(g)
C.C6H6() + CH3I(g) C6H5CH3() + HI(g)
D.C6H6() + Cl2(g) C6H4Cl2() + H2(g)
E.C6H6() + 3 Br2(g) 6 C6H6Br6(g)
Q:
Which of the following chemical equations depicts an alkylation reaction?
A.C6H6() + CH3Cl() C6H5CH3() + HCl(g)
B.2 CH3OH() + 3 O2(g) 2 CO2(g) + 4 H2O()
C.C6H12() C6H10() + H2(g)
D.CH2ClCH2Cl(g) + H2(g) CH3CH3(g) + Cl2(g)
E.CHClCHCl(g) CH2ClCH2Cl(g)
Q:
Which of the following statements concerning hydrocarbons is/are CORRECT?
1/ Coal is a source of many aromatic hydrocarbons.
2/ Petroleum is subjected to a process known as cracking, where aromatic rings are cracked open to yield alkane chains.
3/ The primary components of petroleum (prior to refining) are alkenes and alkynes.
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3
Q:
What is the name of the following benzene derivative? A.dibenzene
B.1,2-dibenzene
C.toluene
D.naphthalene
E.aniline
Q:
What is the name of the following benzene derivative? A.1-chlorobenzoic acid
B.5-chloroanaline
C.1-acetate-1-chlorobenzene
D.5-chlorobenzoic acid
E.1,3-chlorocarboxylic benzene
Q:
Which of the structures below has the common name o-dichlorobenzene (where o- is ortho)?
A.
B.
C.
D.
E.
Q:
How many structures (i.e., unique isomers) exist for tribromobenzene?
A.2
B.3
C.4
D.5
E.6
Q:
Identify the product(s) of the hydrogenation of cis-2-hexene.
A.2-hydroxyhexane
B.2,3-dihydroxyhexane
C.trans-2-hexane
D.carbon dioxide and water
E.hexane
Q:
What is the product of the addition of excess F2 to acetylene?
A.1,2-difluoroethane
B.ethylene
C.1,1,2,2-tetrafluoroethane
D.ethane
E.1,1-difluoroethylene
Q:
What is the product of the addition of HBr to 1-hexene?
A.butane
B.2-bromohexane
C.1-bromohexane
D.1,2-dibromohexane
E.1,2-dibromohexene
Q:
What is the product of the addition of HCl to ethylene?
A.chloroethane
B.chloroethylene
C.1,2-dichloroethane
D.1,1-dichloroethane
E.1,1,2,2-tetrachloroethylene
Q:
What is the product of the addition of F2 to 1-butene?
A.1-fluorobutene
B.1,1-difluorobutane
C.2,2-difluorobutane
D.1,2-difluorobutane
E.1,1,2,2-tetrafluorobutane
Q:
An unsaturated hydrocarbon is
A.a hydrocarbon that contains oxygen.
B.a compound in which all carbon atoms have four single bonds.
C.a compound in which one or more carbon atoms have double or triple bonds.
D.a hydrocarbon that is dissolved in water.
E.a cycloalkane with five or more carbons.
Q:
How many isomers exist for the following benzene derivative, C6H4ClBr?
A.2
B.3
C.4
D.5
E.none
Q:
Which one of the following hydrocarbons is aromatic?
A.
B.
C.
D.
E.
Q:
What is the balanced chemical equation for the combustion of 4-methyl-1-pentene?
A.2 C5H10(g) + 15 O2(g) 10 CO2(g) + 10 H2O()
B.2 C4H10(g) + 13 O2(g) 8 CO2(g) + 10 H2O()
C.C4H8(g) + 6 O2(g) 4 CO2(g) + 4 H2O()
D.C6H12(g) + 9 O2(g) 6 CO2(g) + 6 H2O()
E.C5H12(g) + 13 O2(g) 5 CO2 (g) + 6 H2O()
Q:
What is the name of the following compound? A.3-methyl-2-isopropylacetylene
B.cis-4-methylhexyne
C.4-methyl-2-hexyne
D.1-methy-2-ethyl-4-butyne
E.trans-3-methyl-4-hexyne
Q:
What is the name of the following compound? A.trans-acetylene
B.cis-1,3-pentadiene
C.trans-2,4-pentadiene
D.cis-4-methyl-1,3-butadiene
E.cis-4-methyl-1,3-butene
Q:
What is the name of the following compound? A.trans-1-methyl-1-butene
B.cis-1-methyl-1-butene
C.cis-2-pentene
D.cis-3-pentene
E.trans-1-methyl-2-ethylethylene
Q:
Which one of the following hydrocarbons has cis and trans isomers?
A.hexane
B.1-pentene
C.2-methylpropane
D.2-ethylbutane
E.2-pentene
Q:
How many isomers, both structural and geometric, exist for C5H12?
A.3
B.4
C.5
D.7
E.9
Q:
What is the name of the following compound? A.3,4-diethyl-5-methylheptane
B.3,4,5-heptane
C.3-ethyl-5-(2-butyl)hexane
D.3-(2-butyl)-3-ethylhexane
E.3,5,6-trimethylheptane
Q:
What is the name of the following compound? A.pentanol
B.cyclopentane
C.cyclohexane
D.cyclopentene
E.1,5-pentane
Q:
What is the name of the following compound? A.1,1,1-trimethylbutane
B.3-butylpropane
C.2-methyl-2-propylpropane
D.4,4-dimethylpentane
E.2,2-dimethylpentane
Q:
What is the molecular formula for heptane?
A.C6H12
B.C6H14
C.C7H14
D.C7H16
E.C9H20
Q:
Which of the following noncyclic hydrocarbons has two p bonds?
A.C3H4
B.C4H8
C.C6H12
D.C7H14
E.C8H18
Q:
Which of the following molecules may be a cycloalkene?
A.C4H8
B.C5H12
C.C5H10
D.C6H12
E.C6H10
Q:
Which of the following molecules might be a cycloalkane?
A.C3H4
B.C4H10
C.C5H12
D.C6H10
E.C7H14
Q:
What is the general formula for an alkane?A.CnH2n+2B.CnH2nC.CnHn-2D.Cn+2HnE.CnH2n-2
Q:
For which one of the following molecules do geometric isomers exist?
A.H2ClC-CHCl2
B.BrHC=CHBr
C.ClCCH
D.H3C-CH2Cl
E.H2C=CCl2
Q:
Which one of the following molecules has a chiral center?
A.
B.
C.
D.
E.
Q:
Which one of the following statements concerning isomers is INCORRECT?
A.Pairs of nonsuperimposable molecules are called enantiomers.
B.Enantiomers have identical melting and boiling points.
C.Molecules with two or more geometric isomers are termed chiral pairs.
D.Optical isomers rotate polarized light in opposite directions.
E.Structural isomers have the same composition, but the atoms are linked in different ways.